Finding the Fourth Proportional to 1,345.95, 1,856.59 and 814.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.95 : 1,856.59 = 814.45 : x
2. Step 2: Convert to fraction form
   1,345.95/1,856.59 = 814.45/x
3. Step 3: Cross multiply
   1,345.95x = 1,856.59 × 814.45
4. Step 4: Simplify right side
   1,345.95x = 1,512,099.73
5. Step 5: Solve for x
   x = 1,512,099.73/1,345.95
6. Step 6: Final answer
   x = 1,123.44